A "rail line" refers to a pathway or track system specifically designed for trains or locomotives to travel on. It is like a road or highway but used exclusively by trains for transportation. Full definition
A light rail line into the area would provide alternative transportation and affordable accessibility to jobs, housing and community amenities. (nar.realtor)
These original cars were later replaced with the replica carriage to incorporate the technological advances and the train run shifted to broad gauge rail lines from the narrow gauge. (indianluxurytrains.com)
Typically, proposals for new mines go hand in hand with initiatives to build for new rail lines and export terminals. (coalswarm.org)